CN109652930B - Double-needle machine needle position adjusting mechanism and sewing machine - Google Patents
Double-needle machine needle position adjusting mechanism and sewing machine Download PDFInfo
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- CN109652930B CN109652930B CN201910051407.XA CN201910051407A CN109652930B CN 109652930 B CN109652930 B CN 109652930B CN 201910051407 A CN201910051407 A CN 201910051407A CN 109652930 B CN109652930 B CN 109652930B
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- needle position
- rotating shuttle
- position adjusting
- needle
- lower shaft
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B57/00—Loop takers, e.g. loopers
- D05B57/26—Bobbin holders or casings; Bobbin holder or case guards; Bobbin discharge devices
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B69/00—Driving-gear; Control devices
- D05B69/02—Mechanical drives
Abstract
The invention provides a double-needle machine needle position adjusting mechanism and a sewing machine, wherein the double-needle machine needle position adjusting mechanism comprises a lower shaft, two rotating shuttle tables, a needle position adjusting driving source and a needle position adjusting driving assembly, wherein the two rotating shuttle tables are oppositely arranged along the axial direction of the lower shaft; when the needle position adjusting driving source acts, the needle position adjusting driving source drives the two rotating shuttle tables to move reversely relative to the lower shaft along the axial direction of the lower shaft through the needle position adjusting driving assembly. In this application, when the needle position of duplex machine need be adjusted, only need make the needle position adjust the driving source action can to the interval between two adjustable rotating shuttle platforms realizes the needle position and adjusts, need not overturn the aircraft nose in accommodation process, and be automatically regulated, so convenient operation, efficient, and safe and reliable.
Description
Technical Field
The invention relates to a sewing machine, in particular to a double-needle machine needle position adjusting mechanism for the sewing machine.
Background
The double-needle sewing machine is provided with a left rotating shuttle table and a right rotating shuttle table which are axially arranged along a lower shaft, rotating shuttles are arranged in the left rotating shuttle table and the right rotating shuttle table and driven to rotate by the lower shaft, and a transmission assembly connected between the lower shaft and the rotating shuttles is provided with a transmission gear which synchronously rotates with the lower shaft. In the two-needle sewing machine having the above-described structure, as shown in fig. 1 and 2, the mounting and fixing structure of the left-handed shuttle table 1 and the right-handed shuttle table 2 mainly includes the following three parts: 1. the left-handed shuttle table 1 and the right-handed shuttle table 2 are fixed with the bottom plate 3: the left rotating shuttle table 1 and the right rotating shuttle table 2 are locked on the lower end surface of the bottom plate 3 through a fixing screw 100 and a gasket 200; 2. positioning between the left rotating shuttle table 1 and the right rotating shuttle table 2 and the lower shaft 4: the left rotating shuttle table 1 and the right rotating shuttle table 2 are both arranged on the lower shaft 4 through a pipe sleeve 300 so as to respectively axially position the left rotating shuttle table 1 and the right rotating shuttle table 2 with the lower shaft 4; 3. the left rotating shuttle table 1 and the right rotating shuttle table 2 are respectively fixed between a transmission gear 5 and a lower shaft 4: each of the transmission gears 5 is fixed to the lower shaft 4 by three locking screws 400. When the double-needle sewing machine with the structure is used for adjusting the needle position or maintaining, the specific operation is as follows: turning over the machine head; loosening the fixing screw 100, the pipe sleeve 300 and the locking screw 400; starting maintenance; and the fixing screw 100, the pipe sleeve 300 and the locking screw 400 are locked. The above method has the following disadvantages: due to the structural problem of the double-needle sewing machine, the whole machine head is very heavy, and the fixing screw 100, the pipe sleeve 300 and the locking screw 400 are not easy to loosen, so that great hidden danger is brought to safety operation of personnel for needle position adjustment and maintenance service, the risk that the machine head topples forwards and presses hands easily exists, and the safety and reliability are poor; meanwhile, the operation is complicated, the needle position adjustment cannot be realized quickly, and the efficiency is low.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present invention provides a needle position adjusting mechanism for a double needle machine, which can adjust the needle position quickly and is safe and reliable.
In order to achieve the aim, the invention provides a needle position adjusting mechanism of a double-needle machine, which comprises a lower shaft, two rotating shuttle tables, a needle position adjusting driving source and a needle position adjusting driving assembly, wherein the two rotating shuttle tables are oppositely arranged along the axial direction of the lower shaft; when the needle position adjusting driving source acts, the needle position adjusting driving source drives the two rotating shuttle tables to move reversely relative to the lower shaft along the axial direction of the lower shaft through the needle position adjusting driving assembly.
Furthermore, the needle position adjusting driving source is provided with a rotary driving part which can rotate and is vertical to the lower shaft, the needle position adjusting driving assembly comprises a driving crank, a first connecting rod and a second connecting rod, the driving crank is fixed with the rotary driving part, two ends of the first connecting rod are respectively hinged with one end of the driving crank and one rotating shuttle table, and two ends of the second connecting rod are respectively hinged with the other end of the driving crank and the other rotating shuttle table.
Further, the needle position adjusting drive source is a stepping motor.
Further, the central axis of the rotary driving part and the central axis of the lower shaft are in the same horizontal plane, and the central axis of the rotary driving part and the central axis of the needle bar in the sewing machine are in the same vertical plane.
Further, the first connecting rod and the second connecting rod are parallel; when the driving crank is vertically arranged, the two rotating shuttle tables have the minimum needle position.
Further, the two rotating shuttle tables are both movably arranged in the bottom plate of the sewing machine along the axial direction of the lower shaft; each rotating shuttle table is connected with the bottom plate through a locking screw, each rotating shuttle table is provided with a connecting threaded hole, the bottom plate is provided with a waist-shaped connecting groove extending along the axial direction of the lower shaft at each connecting threaded hole, and the locking screw is sequentially arranged in the waist-shaped connecting groove and the connecting threaded hole in a penetrating mode.
Furthermore, waist shape spread groove is seted up on the up end of bottom plate, locking screw wears to establish in waist shape spread groove and the connecting screw hole from last to down in proper order.
Furthermore, each rotating shuttle table is internally provided with a rotating shuttle, a transmission assembly is arranged between each rotating shuttle and the lower shaft, and the transmission assembly comprises a transmission gear sleeved on the lower shaft; the lower shaft is provided with a first shaft section and a second shaft section which is connected with the first shaft section and has a non-circular cross section, and a connecting groove which is in sliding fit with the second shaft section and is matched with the second shaft section in shape is arranged in the transmission gear; the transmission gear is arranged on the rotating shuttle table.
Furthermore, the transmission gear is arranged on the rotating shuttle table through a pressing bracket sleeved on the second shaft section; the rotating shuttle table is provided with an installation groove, the transmission gear is rotatably accommodated in the installation groove, the pressing support is positioned on one side of the transmission gear, which is opposite to the rotating shuttle table, and is fixed on the rotating shuttle table, a gasket sleeved on the second shaft section is arranged between the transmission gear and the rotating shuttle table, and a gasket sleeved on the second shaft section is arranged between the transmission gear and the pressing support.
Further, the cross section of the second shaft section and the connecting groove are waist-shaped.
Furthermore, the compression bracket comprises a bracket main body part in sliding fit with the second shaft section and a bracket connecting part extending from the bracket main body part, the bracket main body part is connected with the rotating shuttle table through a fixing screw, the bracket connecting part is connected with the rotating shuttle table through an adjusting screw, a waist-shaped adjusting groove axially extending along the second shaft section is formed in the bracket connecting part, and the adjusting screw penetrates through the waist-shaped adjusting groove.
The invention also provides a sewing machine, and the double-needle machine needle position adjusting mechanism is arranged in the sewing machine.
As mentioned above, the double-needle machine needle position adjusting mechanism and the sewing machine provided by the invention have the following beneficial effects:
in this application, when the needle position of duplex machine need be adjusted, only need make the needle position adjust the driving source action can to the interval between two adjustable rotating shuttle platforms realizes the needle position and adjusts, need not overturn the aircraft nose in accommodation process, and be automatically regulated, so convenient operation, efficient, and safe and reliable.
Drawings
Fig. 1 is a schematic view showing a structure of a sewing machine in the prior art.
Fig. 2 is a schematic view of the connection between the lower shaft, the left-handed shuttle table and the right-handed shuttle table of fig. 1.
Fig. 3 is a schematic view of the structure of the sewing machine of the present application.
FIG. 4 is a schematic structural diagram of the needle position adjusting mechanism of the double needle machine shown in FIG. 3.
Fig. 5 is a schematic view of the connection between the two rotating shuttle tables and the lower shaft in fig. 3.
Fig. 6 is an exploded view of fig. 5.
Fig. 7 is a schematic structural view of the lower shaft in fig. 3.
Fig. 8 is an exploded view of fig. 4.
FIG. 9 is a schematic view of the needle position adjustment drive assembly in an initial position.
Fig. 10 is a schematic diagram of fig. 9.
Description of the element reference numerals
1 left-hand shuttle table
2 right rotating shuttle table
21 connecting threaded hole
22 mounting groove
3 bottom plate
31 waist shape
4 lower shaft
41 first shaft section
42 second shaft section
5 drive gear
51 connecting groove
6 needle position adjusting driving source
61 rotation driving part
62 connecting flange
63 elongated slot
7 drive crank
8 first connecting rod
9 second connecting rod
10 locking screw
11 pressing bracket
112 bracket main body part
113 bracket connecting part
114 kidney-shaped adjusting groove
12 shim
13 gasket
14 set screw
15 socket head cap screw
16-axis position screw
17 first connecting pin
18 split retainer ring
19 second connecting pin
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
It should be understood that the structures, proportions, and dimensions shown in the drawings and described herein are for illustrative purposes only and are not intended to limit the scope of the present invention, which is defined by the claims, but rather by the claims. In addition, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description only and are not intended to limit the scope of the present invention, and changes or modifications of the relative relationship thereof may be made without substantial technical changes and modifications.
The application provides a sewing machine, in particular a double-needle machine, wherein a needle position adjusting mechanism of the double-needle machine is configured. For convenience of description, in the following embodiments, the axial direction of the lower shaft in the sewing machine is defined as the left-right direction, the direction of the lower shaft toward the head of the sewing machine is the left direction, and the direction of the lower shaft toward the tail of the sewing machine is the right direction.
As shown in fig. 3 and 4, the double needle machine needle position adjusting mechanism according to the present invention includes a lower shaft 4 extending left and right, two rotating shuttle tables 1,2 oppositely disposed left and right along the axial direction of the lower shaft 4, a needle position adjusting drive source 6, and a needle position adjusting drive assembly, wherein, of the two rotating shuttle tables 1,2, the rotating shuttle table located on the left side is defined as a left rotating shuttle table 1, and the rotating shuttle table located on the right side is defined as a right rotating shuttle table 2; the left rotating shuttle table 1 and the right rotating shuttle table 2 are in sliding fit with the lower shaft 4, and rotating shuttles are arranged in the left rotating shuttle table 1 and the right rotating shuttle table 2; the needle position adjusting driving source 6 is connected with the two rotating shuttle tables 1 and 2 through a needle position adjusting driving component. When the needle position of the double-needle machine needs to be adjusted or maintained, the needle position adjusting driving source 6 is enabled to act, and then the needle position adjusting driving source 6 drives the two rotating shuttle tables 1 and 2 to move reversely relative to the lower shaft 4 along the axial direction of the lower shaft 4 through the needle position adjusting driving component, namely: the left rotating shuttle table 1 moves leftwards, and the right rotating shuttle table 2 moves rightwards synchronously; or the left rotating shuttle table 1 moves rightwards, and the right rotating shuttle table 2 moves leftwards synchronously, so that the distance between the two rotating shuttle tables 1 and 2 is adjusted, the needle position adjustment and the rotating shuttle gap are realized, and the requirements of the double-needle machine on various needle positions are met. The aircraft nose does not need to be turned over and is automatically adjusted in the adjusting process, so that the aircraft nose adjusting device is convenient to operate, fast, efficient, safe and reliable.
The preferred structure of the needle position adjusting driving component is as follows: as shown in fig. 4 and 8, the needle position adjusting drive source 6 has a rotatable rotary drive portion 61, the rotary drive portion 61 extending forward and backward, perpendicular to the lower shaft 4; the needle position adjusting driving assembly comprises a driving crank 7, a first connecting rod 8 and a second connecting rod 9, wherein the first connecting rod 8 and the second connecting rod 9 are rod pieces with the same mounting center distance, preferably the rod pieces with the same structure; the driving crank 7 is fixed with the rotation driving part 61 at the middle position of the length direction; one end of the first connecting rod 8 is hinged to the left-handed rotating shuttle table 1 through a front-back extending shaft position screw 16, the other end of the first connecting rod 8 is hinged to the lower end of the driving crank 7 through a front-back extending first connecting pin 17, two split retainer rings 18 are sleeved on the first connecting pin 17, and the two split retainer rings 18 are respectively abutted to the driving crank 7 and the first connecting rod 8; one end of the second connecting rod 9 is hinged to the right rotating shuttle table 2 through a shaft position screw 16 extending forwards and backwards, the other end of the second connecting rod 9 is hinged to the upper end of the driving crank 7 through a second connecting pin 19 extending forwards and backwards, two split retainer rings 18 are also sleeved on the second connecting pin 19, and the two split retainer rings 18 are respectively abutted to the driving crank 7 and the second connecting rod 9. When the needle position adjusting drive source 6 rotates the drive part 61, the drive crank 7 is driven to rotate together, the drive crank 7 can drive the left rotating shuttle platform 1 and the right rotating shuttle platform 2 to synchronously and reversely move relative to the lower shaft 4 through the first connecting rod 8 and the second connecting rod 9, the needle position adjustment is realized, the whole structure is stable, and the operation is reliable.
Preferably, the needle position adjusting drive source 6 is a stepping motor, the rotating drive part 61 is an output shaft of the stepping motor, the stepping motor is connected with an electric control module in the sewing machine, and the needle position can be directly adjusted through electric control parameters, so that the operation process is more convenient, rapid and intelligent. In addition, a connecting flange 62 is arranged on the shell of the stepping motor, a long groove 63 extending left and right is formed in the connecting flange 62, the connecting flange 62 of the stepping motor is fixed on the bottom plate 3 through a screw penetrating through the long groove 63, the installation position of the stepping motor can be finely adjusted when the stepping motor is assembled by arranging the long groove 63, and the assembly precision and the motion stability of the needle position adjusting mechanism of the double-needle machine are ensured. In this embodiment, the central axis of the rotary drive part 61 and the central axis of the lower shaft 4 are on the same horizontal plane, and the central axis of the rotary drive part 61 and the central axis of the needle bar in the sewing machine are on the same vertical plane; the first connecting rod 8 is parallel to the second connecting rod 9, or at least the installation center line of the first connecting rod 8 is parallel to the installation center line of the second connecting rod 9; the central axis of a needle bar in the sewing machine is positioned at the central position between the left rotating shuttle table 1 and the right rotating shuttle table 2; through the structure, the distance of the left rotating shuttle table 1 and the distance of the right rotating shuttle table 2 moving towards (or away from) the needle rod in the sewing machine are ensured to be consistent.
Further, as shown in fig. 9 and 10, the driving crank 7 is tightly fixed to the rotation driving part 61 by a socket head cap screw 15, and at the same time, a positioning groove is formed in the rotation driving part 61, and the positioning groove is used as a reference position of the stepping motor during assembly to position an initial position of the driving crank 7 when the assembly is completed. Preferably, as shown in fig. 9 and 10, when the central axis of the driving crank 7 extends up and down, that is, when the driving crank 7 is vertically disposed, the included angle between the first connecting rod 8 and the driving crank 7 and the included angle between the second connecting rod 9 and the driving crank 7 are both γ, and γ is greater than or equal to 45 ° and less than or equal to 90 °, and the initial force required when the stepping motor rotates at this angle is smaller, and at this time, the initial force is also in the minimum needle position state (that is, the minimum needle position exists between the left rotary shuttle 1 and the right rotary shuttle 2), and when a specific needle position is required, the output shaft of the stepping motor only needs to rotate clockwise by a certain angle in the view shown in fig. 9, so as to enlarge the distance between the left rotary shuttle 1 and the right rotary shuttle 2, and adjust the distance between the two rotary shuttle 1,2 to the corresponding value, thereby achieving the purpose of adjusting the needle position. The central axis of the driving crank 7 is the connecting line between the hinge point O1 between the driving crank 7 and the first connecting rod 8 and the hinge point O2 between the driving crank 7 and the second connecting rod 9.
Further, as shown in fig. 3 and 5, both the left-handed shuttle table 1 and the right-handed shuttle table 2 are installed in the bed plate 3 of the sewing machine in such a manner as to be movable left and right in the axial direction of the lower shaft 4; specifically, the left-hand shuttle table 1 and the right-hand shuttle table 2 are both mounted on the floor panel 3 at the front. Specifically speaking, each rotating shuttle table 1,2 is connected with the bottom plate 3 through a locking screw 10, two connection screw holes 21 arranged left and right are all formed in each rotating shuttle table 1,2, a waist-shaped connection groove 31 extending left and right along the axial direction of the lower shaft 4 is formed in each connection screw hole 21 on the upper end surface of the bottom plate 3, the locking screw 10 sequentially penetrates through the waist-shaped connection groove 31 and the connection screw holes 21 from top to bottom, and the head of the upper end of the locking screw 10 is located at the upper end of the waist-shaped connection groove 31. Therefore, when the needle position is replaced or maintained, the machine head does not need to be turned over, the locking screw 10 can be unscrewed on the front surface of the bottom plate 3 until the locking screw 10 is separated from the connecting threaded hole 21, and then the stepping motor is controlled to rotate through the electric control setting parameters, so that the needle position can be replaced, the situation that the needle position is frequently replaced by a user can be effectively responded, the risk that the hand is pressed due to the turning over of the machine head can be effectively avoided, and the purposes of intellectualization, safety, reliability and quick service are achieved; after the needle position is changed, the locking screw 10 is screwed down, and the left rotating shuttle table 1 and the right rotating shuttle table 2 are both fixed on the bottom plate 3.
Furthermore, each rotating shuttle table 1,2 is internally provided with a rotating shuttle, a transmission assembly is arranged between each rotating shuttle and the lower shaft 4, and the lower shaft 4 drives the rotating shuttle to rotate through the transmission assembly; as shown in fig. 6, the transmission assembly includes a transmission gear 5 fitted over the lower shaft 4 and a pinion gear provided on the rotary hook, the transmission gear 5 is engaged with the pinion gear, and the transmission gear 5 is mounted on each of the rotary hook stages 1,2, respectively, and fixed in the axial direction of the lower shaft 4. During needle position adjustment, the transmission gear 5 needs to move along with the rotating shuttle tables 1 and 2 where the transmission gear 5 is located, so that the transmission gear 5 can move relative to the lower shaft 4 and can rotate along with the lower shaft 4, and based on the situation, as shown in fig. 5 to 7, the lower shaft 4 comprises a first shaft section 41 and a second shaft section 42 which are sequentially connected from right to left; the cross section of the first shaft section 41 is circular, the central axis of the first shaft section 41 is the central axis of the lower shaft 4, and the first shaft section 41 is used for being connected with a main shaft in the sewing machine and driven by the main shaft to rotate; the cross section of the second shaft section 42 is non-circular, and the left rotating shuttle table 1 and the right rotating shuttle table 2 are both arranged on the second shaft section 42 of the lower shaft 4 in a manner of moving left and right; each transmission gear 5 is provided with a connecting groove 51 which is in sliding fit with the second shaft section 42 and is matched with the second shaft section 42 in shape, so that the second shaft section 42 of the lower shaft 4 is in sliding block fit with the transmission gear 5. Therefore, when the stepping motor drives the left-handed shuttle table 1 and the right-handed shuttle table 2 to synchronously and reversely move through the driving crank 7, the first connecting rod 8 and the second connecting rod 9 during needle position adjustment, the left-handed shuttle table 1 drives the transmission gear 5 arranged on the left-handed shuttle table 1, and the right-handed shuttle table 2 drives the transmission gear 5 arranged on the right-handed shuttle table 2 to move in the left-right direction, so that the transmission gear 5 moves in the left-right direction relative to the lower shaft 4; after the needle position is adjusted, when the sewing machine runs, the lower shaft 4 drives the transmission gear 5 to rotate together, the transmission gear 5 arranged on the left rotating shuttle table 1 drives the rotating shuttle in the left rotating shuttle table 1 to rotate, and the transmission gear 5 arranged on the right rotating shuttle table 2 drives the rotating shuttle in the right rotating shuttle table 2 to rotate.
The mounting structure between the transmission gear 5 and the rotary shuttle table 1,2 is preferably: as shown in fig. 5 and 6, each of the transmission gears 5 is mounted to the rotating shuttle table 1,2 through a set of pressing brackets 11 provided to the second shaft section 42; specifically, the right end face of the left rotating shuttle table 1 and the left end face of the right rotating shuttle table 2 are both provided with mounting grooves 22, the transmission gear 5 is rotatably accommodated in the mounting grooves 22, and the pressing bracket 11 is positioned on one side of the transmission gear 5 back to the rotating shuttle tables 1 and 2 and is fixed on the rotating shuttle tables 1 and 2; in the axial direction of the lower shaft 4, a gasket 12 sleeved on the second shaft section 42 is arranged between the transmission gear 5 and the rotating shuttle table 1,2, and a gasket 13 sleeved on the second shaft section 42 is arranged between the transmission gear 5 and the pressing bracket 11. In this embodiment, the cross-section of the second shaft section 42 and the connecting slot 51 are both kidney-shaped; of course, in other embodiments, the cross-section of the second shaft section 42 and the connecting slot 51 may also both be square, diamond, oval, etc.
Further, as shown in fig. 5 and 6, the pressing bracket 11 includes a bracket main body portion 112 slidably fitted with the second shaft section 42, and a bracket connecting portion 113 horizontally extending from a lower end of the bracket main body portion 112 toward the direction close to the rotating shuttle table 1, 2; the bracket main body 112 has an opening and a through groove penetrating left and right; the bracket main body part 112 is connected with the rotating shuttle table 1,2 through a fixing screw 14; the support connecting portion 113 is connected with the rotating shuttle table 1 and 2 through an adjusting screw, a waist-shaped adjusting groove 114 extending along the axial direction of the second shaft section 42 is formed in the support connecting portion 113, the adjusting screw penetrates through the waist-shaped adjusting groove 114, and the mounting position of the pressing support 11 can be finely adjusted through the adjusting screw and the waist-shaped adjusting groove 114, so that the gap between the gasket 12 and the rotating shuttle table 1 and 2 during fine adjustment assembly is more stable and reliable in overall structure.
In conclusion, the present invention effectively overcomes various disadvantages of the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. The utility model provides a duplex machine needle position adjustment mechanism, includes lower shaft (4) and two and revolves shuttle platform (1,2) along lower shaft (4) axial relative setting, its characterized in that: the needle position adjusting mechanism is characterized by further comprising a needle position adjusting driving source (6) and a needle position adjusting driving assembly, wherein the two rotating shuttle tables (1 and 2) are in sliding fit with the lower shaft (4), and the needle position adjusting driving source (6) is connected with the two rotating shuttle tables (1 and 2) through the needle position adjusting driving assembly; when the needle position adjusting driving source (6) acts, the needle position adjusting driving source (6) drives the two rotating shuttle tables (1,2) to move reversely relative to the lower shaft (4) along the axial direction of the lower shaft (4) through the needle position adjusting driving component; each rotating shuttle table (1,2) is internally provided with a rotating shuttle, a transmission assembly is arranged between each rotating shuttle and the lower shaft (4), and the transmission assembly comprises a transmission gear (5) sleeved on the lower shaft (4); the lower shaft (4) is provided with a first shaft section (41) and a second shaft section (42) which is connected with the first shaft section (41) and has a non-circular cross section, and a connecting groove (51) which is in sliding fit with the second shaft section (42) and is matched with the second shaft section (42) in shape is arranged in the transmission gear (5); the transmission gear (5) is arranged on the rotating shuttle tables (1,2), and the transmission gear (5) is arranged on the rotating shuttle tables (1,2) through a pressing bracket (11) sleeved on the second shaft section (42); the rotating shuttle table is characterized in that a mounting groove (22) is formed in the rotating shuttle table (1,2), the transmission gear (5) is rotatably accommodated in the mounting groove (22), the pressing support (11) is located on one side, back to the rotating shuttle table (1,2), of the transmission gear (5) and fixed on the rotating shuttle table (1,2), a gasket (12) sleeved on the second shaft section (42) is arranged between the transmission gear (5) and the rotating shuttle table (1,2), and a gasket (13) sleeved on the second shaft section (42) is arranged between the transmission gear (5) and the pressing support (11).
2. The needle position adjusting mechanism of a double needle machine according to claim 1, characterized in that: the needle position adjusting driving source (6) is provided with a rotary driving part (61) which can rotate and is perpendicular to the lower shaft (4), the needle position adjusting driving component comprises a driving crank (7), a first connecting rod (8) and a second connecting rod (9), the driving crank (7) is fixed with the rotary driving part (61), two ends of the first connecting rod (8) are hinged with one end of the driving crank (7) and one rotary shuttle table respectively, and two ends of the second connecting rod (9) are hinged with the other end of the driving crank (7) and the other rotary shuttle table respectively.
3. The needle position adjusting mechanism of a double needle machine according to claim 2, characterized in that: the needle position adjusting driving source (6) is a stepping motor.
4. The needle position adjusting mechanism of a double needle machine according to claim 2, characterized in that: the central axis of the rotary driving part (61) and the central axis of the lower shaft (4) are on the same horizontal plane, and the central axis of the rotary driving part (61) and the central axis of a needle bar in the sewing machine are on the same vertical plane.
5. The needle position adjusting mechanism of a double needle machine according to claim 2, characterized in that: the first connecting rod (8) and the second connecting rod (9) are parallel; when the driving crank (7) is vertically arranged, the two rotating shuttle tables (1,2) have the minimum needle position.
6. The needle position adjusting mechanism of a double needle machine according to claim 1, characterized in that: the two rotating shuttle tables (1,2) are both movably arranged in a bottom plate (3) of the sewing machine along the axial direction of a lower shaft (4); each rotating shuttle table (1,2) is connected with the bottom plate (3) through a locking screw (10), each rotating shuttle table (1,2) is provided with a connecting threaded hole (21), the bottom plate (3) is provided with a waist-shaped connecting groove (31) extending along the axial direction of the lower shaft (4) at each connecting threaded hole (21), and the locking screw (10) sequentially penetrates through the waist-shaped connecting groove (31) and the connecting threaded hole (21).
7. The needle position adjusting mechanism of a double needle machine according to claim 6, characterized in that: waist shape spread groove (31) are seted up on the up end of bottom plate (3), lock screw (10) are from last to wearing to establish in proper order down in waist shape spread groove (31) and connecting screw hole (21).
8. The needle position adjusting mechanism of a double needle machine according to claim 1, characterized in that: the cross section of the second shaft section (42) and the connecting groove (51) are waist-shaped.
9. The needle position adjusting mechanism of a double needle machine according to claim 1, characterized in that: the pressing support (11) comprises a support main body portion (112) in sliding fit with the second shaft section (42) and a support connecting portion (113) extending out of the support main body portion (112), the support main body portion (112) is connected with the rotating shuttle table (1,2) through a fixing screw (14), the support connecting portion (113) is connected with the rotating shuttle table (1,2) through an adjusting screw, a waist-shaped adjusting groove (114) extending along the axial direction of the second shaft section (42) is formed in the support connecting portion (113), and the adjusting screw penetrates through the waist-shaped adjusting groove (114).
10. A sewing machine characterized by: the sewing machine is provided with the double needle bed needle position adjusting mechanism of any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910051407.XA CN109652930B (en) | 2019-01-21 | 2019-01-21 | Double-needle machine needle position adjusting mechanism and sewing machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910051407.XA CN109652930B (en) | 2019-01-21 | 2019-01-21 | Double-needle machine needle position adjusting mechanism and sewing machine |
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| CN109652930A CN109652930A (en) | 2019-04-19 |
| CN109652930B true CN109652930B (en) | 2021-07-13 |
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| CN113373605B (en) * | 2020-03-09 | 2022-11-01 | 启翔股份有限公司 | Sewing machine with variable needle pitch |
| CN112323272A (en) * | 2020-11-26 | 2021-02-05 | 林德访 | Sewing machine capable of automatically adjusting rotating shuttle |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0489085A (en) * | 1990-07-31 | 1992-03-23 | Eiji Shigemasa | Stitch skipping device for lock stitch sewing machine |
| US6305304B1 (en) * | 1997-11-25 | 2001-10-23 | Juki Corporation | Two-needle sewing machine |
| JP2008302120A (en) * | 2007-06-11 | 2008-12-18 | Juki Corp | Sewing machine |
| JP2010115359A (en) * | 2008-11-13 | 2010-05-27 | Brother Ind Ltd | Shuttle drive mechanism for sewing machine |
| CN102605572B (en) * | 2012-04-05 | 2013-04-17 | 宁波舒普机电科技有限公司 | Double-needle loop sewing machine with transmission structure |
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| CN109652930A (en) | 2019-04-19 |
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Address after: 318010 No. 1008, east section of Donghai Avenue, Sanjia, Jiaojiang District, Taizhou City, Zhejiang Province Patentee after: Jack Technology Co.,Ltd. Address before: 318010 No. 15 Airport South Road, Jiaojiang District, Zhejiang, Taizhou Patentee before: JACK SEWING MACHINE Co.,Ltd. |
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